Questions

Answer the following questions to check what you have learned about TypeScript:

1. What would the inferred type be for the flag variable in the following code?

   let flag = false;

2. What is the return type in the following function?

   function log(message: string) {

     return console.log(message);

   }

3. What is the type annotation for an array of dates?
4. Will a type error occur in the following code?

   type Point = {x: number; y: number; z?: number};

   const point: Point = { x: 24, y: 65 };

5. Use a type alias to create a number that can only hold integer values between and including 1 and 3.
6. What TypeScript compiler option can be used to prevent the transpilation process when a type error is found?
7. The following code raises a type error because lastSale can’t accept null values:

   type Product = {

     name: string;

     lastSale: Date;

   }

   const table: Product = {name: "Table", lastSale: null}

How can the Product type be changed...